Grate-bar



(No Model.) 7

lli I lllllllllllll GRATE BAR. No. 246,016. Patented Aug. 23,1881.

Fay. J. I C

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llll llllllllll Ill lllllllll UNITED STATES PATENT OFFICE.

JOHN C. KNOEPPEL, OF MILWAUKEE, WISCONSIN.

GRATE-BAR.

SPECIFICATION forming part of Letters Patent No. 246,016, dated August23, 1881.

ApplicationfiledJune 14,1881. (Nomodel.)

T 0 all whom it may concern Be it known that 1, JOHN C. KNOEPPEL, ofMilwaukee, in the county of Milwaukee, and in the State of Wisconsin,have invented certain new and useful Improvements in Grate- Bars; and Ido hereby declare that the following is a full, clear, and eXactdescription thereof.

My invention relates to gratebars, and will be fully describedhereinafter.

In the drawings, Figure 1 is a side view of my improved grate-bar. Fig.2 is a top view, with part of the top flange broken away. Fig. 3 is asectional view. Fig. 4 is a perspective view, and Fig. 5 is a detail.

, A is the web of the bar, which is straightat its ends a a, but iswaved or corrugated midway to permit the bar to expand or contract undervarying temperatures without warping laterally, and to restrain anytendency to warp vertically I provide the web with flanges B, which maybe either straight or corrugated. These flanges B also serve to makeupthe firebed, and render it unnecessary to place the bars as neartogether as formerly, and also do away with the'necessity of using thickbars, as the flanges supply the requisite strength to a bar much thinnerthan could formerly be used, and in addition to the saving of materialby-reason of making the bars thin and placing them farther apart, I getmore draft, which is always a great consideration.

To keep down the temperature of my gratebars I provide each one withperforations or slots 0, and I preferably arrange .these slots so thatthey shall break joints with each other, as shown in the drawings; butthey may be on a line with each other, and at either frequent or remoteintervals. These slots permit a constant draft through the bars from endto end, which carries off the heat and prevents the bars from beingburned out rapidly, as gratebars usually are. My improved bars may beset in their places with either flange exposed to the fire, and whenthat flange has been rendered unserviceable from long exposure to theheat the bar may be reversed and its other flange exposed, and thereforeone of my bars will outlast two of ordinary construction.

In order to more effectually brace and strengthen my bars when inposition for use,

I preferably cast lugs b on one side of each flange, as shown in Figs. 2and 5, which will abut against the flanges of the bar next thereto, andso on throughout the entire grate.

My improved grate-bars cost less to manufacture than the ordinary thickbars, are not liable to warp or crack, and, being reversible, one ofthese bars is more than equal to two of the old pattern.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a furnace grate-bar, the combination of a waved or corrugated weband top and bottom flanges, as set forth.

2. In a furnace grate-bar, the combination of a waved or corrugated webprovided with transverse slots or perforations, with top and bottomflanges, as shown and described.

3. In a furnace grate-bar, a waved or corrugated web provided with twoor more series of transverse slots or perforations, arrangedalternately, as shown, in combination with top and bottom flanges, asset forth.

4. A reversible furnace grate-bar having a waved or corrugated web,straight at each end, and provided with transverse slots or perforationsand top and bottom flanges,as set forth.

5. A reversible furnace grate-bar having top and bottom flanges, and awaved or corrugated web, straight at each end, and provided with two ormore series of transverse slots or perforations, arranged alternately,as shown and described.

6. A reversible furnace grate bar with straight web and flanges at eachend, and intermediate waved or corrugated web, and waved top andbottomflanges, as shown and described.

7. A reversible furnace grate bar with straight web and flanges at eachend, and intermediate waved top and bottom flanges, and waved orcorrugated web provided with transverse slots or perforations, as setforth.

8. A reversible furnace grate bar with straight web and flanges at eachend, and intermediate waved top and bottom flanges, and waved orcorrugated web provided with two or more series of transverse slots orperforations, arranged alternately, as shown and described.

9. A reversible furnace grate-bar provided straight web and flanges ateach end, and in- I5 termediate waved top and bottom flan ges,havinglugs cast thereon, and waved or corrugated web, having two or moreseries of transverse slots or perforations, arranged alternately, asshown and described.

In testimony that I claim the foregoing I have hereunto set my hand this2d day of June, 1881.

JOHN C. KNOEPPEL.

Witnesses:

S. S. STOUT, HAROLD G. UNDERWOOD.

